Scientific Method Flashcards
Gel electrophoresis
A test to compare DNA or proteins DNA is cut with enzymes then placed in wells.
Small fragment fall to bottom of plate compare banding patterns to read
Chromatography
A test to separate pigments(color)
Put pigment above water line
Indicator
A chemical that changes color with another chemical ex: Iodine= Amber
Iodine + starch= blue/black
Control
“Normal”
With medicine studies= placebo
Used for comparison
Dependent Variable
What to measure to answer your research question
Put y axis
“Amount of”
“Rate of”
Hypothesis
Educated prediction
IF(we do this), Then(this will happen)
Independent Variable
One per experiment
One factor that you change
Category “type of”
Placebo
Used for the control group in medicine studies
-saline shot or sugar pill
Sample size
- large groups of test subjects
- must have a large sample size to have accurate and reliable data
- reduces affect of individual differences
Theory
- A hypothesis that has been supported many many many times.
- Similar to a law but more complex understanding
Bias
Belief that is influenced by assumptions
Inference
Conclusions based on observations
Peer review
Several scientists examine the details of the experiment
Conclusion
Decision about the results
Control
Reference point used for comparison
Data
Information gathered from experiment
Observation
Data that is collected by the senses
Compound light microscope
Magnifies translucent objects
Dichotomous key
Chart 2 options per level, used to classify organisms
Dissection
Examination of preserved specimens
Graduated cylinder
Tool used to measure liquid volume
Magnification
Enlarge the view of the object
Mass
Quantity of matter
Metric ruler
Tool used to determine length in metric units
Model
A representation of concept that is difficult that is difficult or impossible to view
Stain
Chemical used to enhance microscopic view of biological samples
Triple beam balance
Instrument used to find mass in grams
Volume
The space an object occupies
Angel
Henchey
